what is round an brown an lays on the ground an has four wheels?

A TURD

Gommers pile

a brown four-wheeled hen?

A turd I'm just sittin u about the wheels

Based on your description, the object you are referring to is most likely a brown, round and flat object with four wheels that can be found on the ground. This points to the possibility that you are referring to a common everyday object known as a "tire" or "tyre".

To get this answer, I used deductive reasoning based on your description. By analyzing the characteristics you provided (round, brown, lays on the ground, four wheels), I eliminated other possibilities such as fruits, animals, or objects that do not have wheels. This led me to conclude that a tire is the most fitting answer.